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Br J Nutr ; 115(9): 1509-20, 2016 05.
Artigo em Inglês | MEDLINE | ID: mdl-26983845

RESUMO

The aim of the present study was to assess the effects of dietary supplementation with epidermal growth factor (EGF)-expressing Saccharomyces cerevisiae on duodenal development in weaned piglets. In total, forty piglets weaned at 21-26 d of age were assigned to one of the five groups that were provided basic diet (control group) or diet supplemented with S. cerevisiae expressing either empty-vector (INVSc1(EV) group), tagged EGF (T-EGF) (INVSc1-TE(-) group), extracellular EGF (EE-EGF) (INVSc1-EE(+) group) or intracellular EGF (IE-EGF) (INVSc1-IE(+) group). All treatments were delivered as 60·00 µg/kg body weight EGF/d. On 0, 7, 14 and 21 d, eight piglets per treatment were sacrificed to analyse the morphology, activities and mRNA expressions of digestive enzymes, as well as Ig levels (IgA, IgM, IgG) in duodenal mucosa. The results showed significant improvement on 7, 14 and 21 d, with respect to average daily gain (P<0·05), mucosa morphology (villus height and crypt depth) (P<0·05), Ig levels (P<0·01), activities and mRNA expressions of digestive enzymes (creatine kinase, alkaline phosphatase, lactate dehydrogenase and sucrase) (P<0·05) and the mRNA expression of EGF-receptor (P<0·01) in NVSc1-TE(-), INVSc1-EE(+) and INVSc1-IE(+) groups compared with control and INVSc1(EV) groups. In addition, a trend was observed in which the INVSc1-IE(+) group showed an improvement in Ig levels (0·05

Assuntos
Suplementos Nutricionais , Duodeno/efeitos dos fármacos , Fator de Crescimento Epidérmico/farmacologia , Mucosa Intestinal/efeitos dos fármacos , Saccharomyces cerevisiae/metabolismo , Fosfatase Alcalina/genética , Fosfatase Alcalina/metabolismo , Animais , Creatina Quinase/genética , Creatina Quinase/metabolismo , Duodeno/crescimento & desenvolvimento , Duodeno/metabolismo , Fator de Crescimento Epidérmico/administração & dosagem , Receptores ErbB/genética , Receptores ErbB/metabolismo , Imunoglobulinas/metabolismo , Mucosa Intestinal/crescimento & desenvolvimento , Mucosa Intestinal/metabolismo , L-Lactato Desidrogenase/genética , L-Lactato Desidrogenase/metabolismo , Lactococcus lactis , RNA Mensageiro/metabolismo , Proteínas Recombinantes/administração & dosagem , Proteínas Recombinantes/farmacologia , Sacarase/genética , Sacarase/metabolismo , Suínos , Desmame
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